生き物の話題：　ゴリラ - 遊蕩爺の漂浪メモ

The silverback is the center of the troop's attention, making all the decisions, mediating conflicts, determining the movements of the group, leading the others to feeding sites, and taking responsibility for the safety and well-being of the troop. Younger males subordinate to the silverback, known as blackbacks, may serve as backup protection. Blackbacks are aged between 8 and 12 years and lack the silver back hair. （上掲ウィキペディアより）

そりゃぁ狭いところに閉じ込められて覗かれれば、ストレスも溜まるでしょう−−−

　Gorilla break glass at Henry Doorly Zoo and Aquarium in Omaha, Nebraska
　KMTV Action 3 News, 2015/04/17 に公開

　Silverback gorilla scares people at the Henry Doorly Zoo in Omaha Nebraska
　RyanDale311, 2011/08/22 にアップロード

　Gorilla Attack at the Omaha Zoo in March of 2009
　ronstorhaug, 2009/04/12 にアップロード
　※ オマハですから同じ動物園？